org.apache.hadoop.hive.ql.ppd
Class PredicateTransitivePropagate

java.lang.Object
  org.apache.hadoop.hive.ql.ppd.PredicateTransitivePropagate

All Implemented Interfaces:

Transform

public class PredicateTransitivePropagate
extends Object
implements Transform

propagates filters to other aliases based on join condition

Constructor Summary

PredicateTransitivePropagate()

Method Summary

ParseContext

transform(ParseContext pctx) All transformation steps implement this interface.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PredicateTransitivePropagate

public PredicateTransitivePropagate()

Method Detail

transform

public ParseContext transform(ParseContext pctx)
                       throws SemanticException

Description copied from interface: Transform

All transformation steps implement this interface.

Specified by:

transform in interface Transform

Parameters:

pctx - input parse context

Returns:

ParseContext

Throws:

SemanticException